Twelve
million years ago, a war touched the Earth briefly. Now, in Antarctica, an
archaeological team has discovered the detritus of the conflict. And it's
alive.

Twelve million years ago, a creature evolved that was capable
of consuming all life in the universe. Now someone, or something, is desperate
enough to want to revive it.

Outside
the ordered universe, things move. They're hungry. And something has given them
the scent of our space/time.

In the far
future, The Doctor has learnt of the war and feels he must intervene - but it's
more than just a local conflict of interest. One of the groups of combatants is
from his own future, and the other has never, ever, existed.

Notes:

This is another in the series of original adventures
for the Eighth
Doctor.